Allied Telesis AT-2814FX/SC-001 Bedienungsanleitung

613-001676 Rev. C AT-2814FX Fast Ethernet Fiber (SC) ExpressCard Installation and User’s Guide[...]

Copyright © 2012 Allied Telesis, Inc. All rights reserved. No part of this publication may be repr oduced withou t prior written permissi on from Allied Telesis, Inc. Microsoft and Internet Explorer are regi stered trademarks of Microsoft Corpo rat ion. Netscape Navigator is a registered trademark of Netscape Communications Corporati on. Al l othe[...]

3 Electrical Safety and Emissions St a n d a r d s This product meets the following standards. RFI Emissions FCC Class B, EN55022 Class B, VCCI Class B, C-TICK, CE Immunity EN55024 Class B Electrical Safety EN60950 (TUV), UL 60950-1 ( C UL US ) U.S. Federal Communications Commission Declaration of Conformity Manufacturer Name: Allied Telesis, Inc. [...]

4 T ranslated Safety S tatements Important: The  indicates that a translation of th e safety statement is available in a PDF document titled “Translated Safety State ment s” posted on the Allied Telesis website at: www.alliedtelesis.com/support/ .[...]

5 Contents Preface .............. .............. ............ .............. .............. .............. .............. .............. .............. ... ............. ............... .............. ....... 11 Safety Symbols Used in th is Docu ment........ .............. .............. .............. .............. .............. ............. ..[...]

Contents 6 Appendix A: Specifications ..................... .............. ........... .............. .............. .............. .............. .............. ........... ............... 79 Physical Specifications .................. ................. ... ........ .............. .............. .............. .............. .. ...... .............[...]

7 Figur es Figure 1. AT-2814FX ExpressCard . ............ ............................ .......................................... ............ ........... .............. ............. 16 Figure 2. AT-2814FX LED . .......... .......................................... ....................................... ........... ........... .............. ....[...]

Figures 8[...]

9 Ta b l e s Table 1: Fiber Optic Port LED Status ................... .............. .............. ................. .............. ............ ................... .............. ....... 17[...]

Tables 10[...]

11 Pr eface This manual is the installation and user’s guide for the AT-2814FX Fast Ethernet Fiber (SC) ExpressCard. The instructions in this gu ide explain how to install the ExpressCard on a laptop computer, insta ll and uninstall the driver software, and configu re the driver softwar e. This preface contains the following sections:  “Safe[...]

Preface 12 Safety Symbols Used in this Document This document uses the following conventions: Note Notes provide additional informatio n. Caution Cautions inform you t hat performing or omitting a spe cific action may result in equipment damage or loss of data. Warning Warnings inform you that performing or omitting a sp ecific action may result in[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 13 Contacting Allied Telesis If you need assistance with this prod uct, you may contact Allied Telesis technical support by going to the Suppo rt & Services section of the Allied Telesis web site at www.alliedtelesis.com/support . You can find links for the followi[...]

Preface 14[...]

15 Chapter 1 Overview This chapter provides an overview of the the AT -2814FX Fast Ethernet Fiber (SC) ExpressCard in the following section s:  “Physical Description” on page 16  “Supported Operating Systems” on p age 18  “Hardware Features” on p age 19  “Contents of Y our Shipment” on p age 20[...]

Chapter 1: Ove rview 16 Physical Description The AT-2814FX ExpressCard is an integrated Fiber Fast Ethern et PCI ExpressCard with a pair of SC fiber connectors ba sed on Marvell 88E8059 chipset. A PCI ExpressCard is a new notebook interface that re places the PCMCIA Card Bus interface. Using fiber optic cabling and a co nnector that meets 62.5/125 [...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 17 LED The AT-2814FX ExpressCard has o ne LED as shown in Figure 2. Figure 2. AT-2814FX LED Table 1 describes the lin k states that the LED indicates. Stabilizer The stabilizer is a plastic bracket to help the ExpressCar d snugly fit into the 54mm PCI ExpressCard slot.[...]

Chapter 1: Ove rview 18 Supported Operating Systems The following operating systems are supported :  Windows XP  Windows V ista  Windows 7  Linux 2.6 When new driver software is released, they will be posted on the Allied Telesis website: www.alliedtelesis.com/support/software/ . Note The procedures for Installing th e driver software f[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 19 Hardware Features The AT-2814FX ExpressCard suppo rts the following features:  One 100BASE-FX port with a p air of SC multi-mode fiber connecto rs  Full and half duplex Media Access Control (MAC)  Link/Activity LED  PCI ExpressCard Interface  Flow con[...]

Chapter 1: Ove rview 20 Contents of Your Shipment The following items are included with your AT-2814 FX ExpressCard:  Antistatic bag The ExpressCard is shipped in an antist atic bag. It protect s the card when stored or shipped. Keep the card in its p ackaging until ready for installation.  Rubber plug The rubber plug prevent s the fiber opti[...]

21 Chapter 2 Installing the Driver Softwar e This chapter describes how to instal l driver software for the AT-2814FX ExpressCard onto your operating system. It contains the following topics:  “Overview” on page 22  “Downloading the Driver Sof tware” on page 23  “Installing the Drive r Software” on p age 24 Note To set Advanced[...]

Chapter 2: Installi ng the Driver Software 22 Overview To install the driver software, you must download the driver software for the AT-2814FX ExpressCard from the Allied Tele sis website onto your operating system. Allied Telesis recommends installing the d river software for the AT- 2814FX ExpressCard before physically installing the card. Guidel[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 23 Downloading the Driver Software The AT-2814FX ExpressCard is not sh ipped with a software driver CD. You must download driver software from the Allied Telesis website. To download driver software, do the follo wing: 1. Open a web browser , such as Internet Explorer [...]

Chapter 2: Installi ng the Driver Software 24 Installing the Driver Software To install the driver software for the AT-281 4FX ExpressCard, do the following: 1. Locate the AT2814FX-drive rs-setup zip folder that you downloaded from the Allied Telesis website onto you r system. See “Downloading the Driver Software” on page 23. 2. Open the folder[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 25 The Marvell Miniport Driver Setup Wizard window come s up. See Figure 6. Figure 6. Marvell Miniport Driver Setup Wizard 5. Click Next . The Licence Agreement window comes up as sh own in Figure 7.[...]

Chapter 2: Installi ng the Driver Software 26 Figure 7. Setup Wizard License Agreement 6. Read the License Agreement. 7. If you accept the terms of the agreement, select the first option and click Install . When the inst allation is completed, the Inst allation Complete window is displayed. See Figure 8. Figure 8. Installation Complete 8. Click Nex[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 27 Figure 9. Finishing Setup Wizard 9. Click Finish .[...]

Chapter 2: Installi ng the Driver Software 28[...]

29 Chapter 3 Installing the Hardwar e This chapter contains the following sections:  “Reviewing Safety Precautions” on p age 30  “Pre-Installa tion Checklist” on p age 32  “Installing the A T -2814FX ExpressCard” on page 33  “Connecting the Network Cable” on page 38[...]

Chapter 3: Inst alling the Hardwa re 30 Reviewing Safety Precautions Please review the following safety pr ecautions before you begin to install the AT-2814FX ExpressCard. Note The  indicates that a tr anslation of the safety statement is available for viewing in portable do cument format (PDF) titled Translated Safety Statements from ou r web s[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 31 Warning The AT-2814FX ExpressCard is being inst alled in a system that operates with voltages that can be lethal. Before you remove the cover of your system, you must ob serve the following precautions to protect yourself and to prevent damage to the system componen[...]

Chapter 3: Inst alling the Hardwa re 32 Pre-Installation Checklist Before installing the AT -2814FX Expr essCard, check th e following list: 1. Verify that your laptop is using the latest BIOS. 2. When you download the driver software from the Allied Telesis support website, record the path to where the driver file re sides on your system. 3. If yo[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 33 Installing the AT-2814FX ExpressCard The following instructions describe how to insta ll the AT-2814FX ExpressCard in a laptop computer equ ipped with a 34 mm or 54 mm PCI ExpressCard interface slot. The installation illustrations in this manual use the 54 mm interf[...]

Chapter 3: Inst alling the Hardwa re 34 Figure 10. Selecting the PCI ExpressCard Slot 3. Use a pen and press the button toward th e laptop and to the left. See Figure 11. The button pops out along with the plate. See Figure 1 2 on page 35. Figure 11. Pressing the Button[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 35 Figure 12. The Button and Plate a fter Pressing the Button 4. Remove the plate from the laptop. See Figure 13. Keep the plate in a safe place. Y ou may need it for future use. Figure 13. Removing the Plate 5. When installing the ExpressCard in the 54mm Express Card [...]

Chapter 3: Inst alling the Hardwa re 36 Figure 14. Attaching the Stabilizer to the AT-2814FX ExpressCard 6. Applying even pressure at both corne rs of the ExpressCard, push the card until it is firmly seated in the PCI ExpressCard slot. Figur e 15 shows how to insert the card in the 54mm slot. The ExpressCard fits snugly into the slot. Figure 15. I[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 37 7. Make sure the ExpressCard is seated secure ly. 8. Power on the laptop computer. Once the system returns to prop er operation, the ExpressCard hardware is fully inst alled. Nex t, connect the network cables. See “Connecting the Network Cable” on page 38.[...]

Chapter 3: Inst alling the Hardwa re 38 Connecting the Network Cable The AT-2814FX ExpressCard has a pair of o ptic connectors for attaching the laptop to a compatible link pa rtner, or an IEEE 802.3z compliant Fast Ethernet switch. One optic connecter is fo r transmitting and the other is for receiving. To connect the ExpressCard to a netwo rk, yo[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 39 Note Even minor smudges or dirt on the e nd face of the fiber can disrupt light transmission and lead to fa ilure of the conne ction. For instructions that describe how to clean the fiber optic connector, see Appendix B “Cleaning Fiber Optic Connectors” on page [...]

Chapter 3: Inst alling the Hardwa re 40[...]

41 Chapter 4 Modifying Advanced Pr operties This chapter includes the following topics:  “Overview” on page 42  “S tarting the Device Mana ger” on page 43  “Flow Control” on p age 50  “Interrupt Moderation” on p age 52  “Jumbo Packet” on pag e 54  “Large Send Of fload (IPv4)” on p age 56  “Log S tatus [...]

Chapter 4: Modi fying Advanced Prope rties 42 Overview To modify the advanced properties of the AT-2814FX ExpressCard, you must access the Device Manager on y our operating system, the n go to each advanced property page. To start the Device Manager, see “Starting the Device Manager” on page 43. Guidelines Here are t he guidelines to m odifying[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 43 Starting the Device Manager The procedures for accessing the De vice Manager are d ifferent among Windows XP, Windows Vista and Windows 7. To start the Device Manager on your system, perform one of the following procedures:  “Device Manager on Windows XP” on [...]

Chapter 4: Modi fying Advanced Prope rties 44 Figure 17. Hardware Page on Windows XP 3. Click Device Manager . The Device Manager window opens shown in Figure 18. Figure 18. Device Manager Window on Wind ows XP[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 45 4. In the Device Manager window, click the + next to the Network Adapters folder. The selection expands to show the list of in stalled net work adapter cards as shown in Figure 19. Figure 19. Device Manager with an Expanded List on Windows XP 5. Double-click on Alli[...]

Chapter 4: Modi fying Advanced Prope rties 46 Figure 20. Properties Window 6. Click the Advanced tab. The Advanced Properties window op ens as shown in Figure 21. Figure 21. Advanced Properties Window[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 47 Device Manager on Windows Vista and Windows 7 The procedures for accessing the Device Manager on Windows Vista and Windows 7 are identical. To start th e Device Manager on Windows Vista or Windows 7, do the following: 1. Right-click on Computer and select Properties[...]

Chapter 4: Modi fying Advanced Prope rties 48 Figure 23. Device Manager Window on Wind ows Vista and 7 3. In the Device Manager window, click the  next to the Network Adapters folder. The selection expand s to show the list of inst alled network adapter cards. See Figure 24. Figure 24. Device Manager with an Expan ded List on Windows Vista &[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 49 4. Double-click on Allied Telesis AT-2814FX. The properties window pop s up as shown in Figure 25 on p age 49. Figure 25. Properties Window on Windows Vista and 7[...]

Chapter 4: Modi fying Advanced Prope rties 50 Flow Control The Flow Control feature allows you to control the flow betwe en the AT- 2814FX ExpressCard and the link partner. You can enable or disable this feature to process received pause frames and transmit pause frames. To enable or disable the Flow Control feature, do th e following: 1. Access th[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 51  Tx & Rx Enabled — The AT-2814FX ExpressCard processe s pause frames when receiving and t ransmits pause frames This is the default setting. 6. Click OK .[...]

Chapter 4: Modi fying Advanced Prope rties 52 Interrupt Moderation The Interrupt Moderation feature allows you to limit the rate of interrupts to the CPU during packet transmission and packet recept ion. When this feature is enabled, interrupts are handled as a gro up so that the CPU utilization decreases; however, the late ncy may increase. The in[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 53 5. Select one of the following options:  Disabled — The Interrupt Moderatio n feature is disabled  Enabled — The Interrupt Moderation feature is enabled. This is the default setting. 6. Click OK .[...]

Chapter 4: Modi fying Advanced Prope rties 54 Jumbo Packet The Jumbo Packet property specifies the size o f the frame that the AT- 2814FX ExpressCard supports. The network performance usually improves when the larger packet size is specified ; however, the network must be capable of supporting such la rge packets. To change the Jumbo Packet size, d[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 55 5. Select one of the following options:  1514 Bytes — The AT-2814FX ExpressCard supp orts up to 1514 bytes in a packet size. This is the default value.  4088 Bytes — The AT-2814FX ExpressCard supp orts up to 4088 bytes in a packet size.  9014 Bytes — [...]

Chapter 4: Modi fying Advanced Prope rties 56 Large Send Offload (IPv4) The Large Send Offload feature for IPv4 traffic allows you to control the load of sending out large packets. When this feature is enabled, the AT- 2814FX ExpressCard segments large packets and reduces the CPU load. To enable or disable the Large Send Offload (IPv4) feature, do [...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 57 5. Select one of the following options:  Disabled — The AT-2814FX ExpressCard does not seg ment packets.  Enabled — The AT-2814FX ExpressCard segments large packets before sending them out. This option re duces the CPU load as the AT-2814FX ExpressCard per[...]

Chapter 4: Modi fying Advanced Prope rties 58 Log Status Messages The Log Status Messages property sp ecifies which messages to be generated and stored in the event log file. To change the Log Status Messages setting, do the following: 1. Access the Device Manger on your o perating system. See “S tarting the Device Mana ger” on page 43. 2. Clic[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 59  Errors — Only erro r messages are generated and stored in the event log file.  None — No message is generated.  Status Messages — An event log entry is g enerated every time the link status changes and stored in the event log file. This is the defaul[...]

Chapter 4: Modi fying Advanced Prope rties 60 Max IRQ per Sec The Max IRQ per Sec property specifies the rate of interrupts to the CPU during packet transmission and packet reception. Th e interrupt Moderation feature uses this p roperty to group CPU interrupts. When the Interrupt Moderation is disabled, the value of Max I RQ per Sec is ignored. To[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 61 Network Address The Network Address allows you to replace the MAC address originally assigned to the AT-2814FX ExpressCard with a use r-defined address. The user-defined address that you a ssign to the ExpressCard is called a locally administered address. Caution A [...]

Chapter 4: Modi fying Advanced Prope rties 62 4. In the Value textbox, enter a lo cally administered address for the AT- 2814FX ExpressCard. Here are guidelines to a ssigning a locally administered address:  The address must be unique.  The address consists of a 12-digit hexadecimal number , for example, “000C46005501.”  The range is f[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 63 Receive Buffers The Receive Buffers property set s the number of receive buffers that is allocated for the AT-2814FX ExpressC ard. Increasing this value may enhance performance in receiving traf fic, but consumes more system memory. To change the Receive Buff ers va[...]

Chapter 4: Modi fying Advanced Prope rties 64 5. Select one of the following nu mbers:  256 — This is the default value.  512 6. Click OK .[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 65 Speed & Duplex The Speed & Duplex pro perty set bot h the link speed and the duplex mode of the AT-2814FX ExpressCard. To change the Speed & Duplex p roperty, do the following: 1. Access the Device Manger on your opera ting system. See “S tarting the D[...]

Chapter 4: Modi fying Advanced Prope rties 66  100 Mbps Half Duplex — 100 Mbps speed in the half d uplex mode. 6. Click OK .[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 67 TCP/UDP Checksum Offload (IPv4) The TCP/UDP Checksum Offload (IPv 4) function enables the AT-2814FX ExpressCard to compute the checksum of tran smitting packets and verify the checksum of receiving packets, taking load off from the CPU on your laptop. To enable or d[...]

Chapter 4: Modi fying Advanced Prope rties 68 5. Select one of the following op tions:  On — Enables the TCP/UDP Checksum Offload function. This is the default setting.  Off — Disables the TCP/UDP Checksum Offload function. 6. Click OK .[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 69 Transmit Buffers The Transmit Buffers property specifies the number of transmit buffers that is allocated for the AT-2814FX Expr essCa rd. Increasing this value may enhance performance in transmitting tra ffic, but consumes more system memory. To change the Transmit[...]

Chapter 4: Modi fying Advanced Prope rties 70 5. Select one of the following nu mbers:  256 — This is the default value.  512 6. Click OK .[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 71 Wake From Shutdown The Wake From Shutdown feature enables your laptop to start from the shutdown state when the AT-2814FX Expr essCard receives the types of frame that are specified by “Wake-Up Capabilities” on page 73. To enable or disable the Wake From Shutdow[...]

Chapter 4: Modi fying Advanced Prope rties 72 5. Select one of the following op tions:  On — Enables the Wake From Shu tdown feature.  Off — Disables the Wake From Shutdown feature. This is the default setting. 6. Click OK .[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 73 Wake-Up Capabilities The Wake-Up Capabilities property sp ecifies the type of frame that the Wake From Shutdown feature uses. When the Wake From Shutdown feature is enabled, your lapt op starts from the shutdown state as the AT- 2814FX ExpressCard receive s the type[...]

Chapter 4: Modi fying Advanced Prope rties 74 5. Select one of the following op tions:  Link Change — Your laptop wakes up from the shutdown sta te when the link status is chang ed if the Wake From Shutdown feature is enabled.  Magic Packet — Your laptop wakes up from the shutdown state when the AT-2814F X ExpressCard receives a special p[...]

75 Chapter 5 Uninstalling the Driver Softwar e This chapter describes how to uninsta ll the driver software for the AT- 2814FX ExpressCard. This chapter contains the following to pics:  “Overview” on page 76  “Uninstalling t he Driver Software” on p age 77[...]

Chapter 5: Uni nstalling the Driver Soft ware 76 Overview When you no longer use the AT-2814FX ExpressCard for your laptop computer, you may want to uninstall the drive r software from your operating system. Guidelines Here are the guidelines to uninst alli ng the driver software from your system:  Y ou must have Administrator privileges to remo[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 77 Uninstalling the Driver Software To uninstall the driver software from you r operating system, do the following: 1. Start you Windows operating system and log in. 2. Open the Device Manager. For instructions on how to open the Device Manager , see “S tarting the D[...]

Chapter 5: Uni nstalling the Driver Soft ware 78 Figure 39. Device Manager Window with an Optio n List A Confirm Device Uninst all window pop s up as shown in Figure 40. Figure 40. Confirm Device Uninstall Window 5. Check the checkbox if you wan to remove additional driver a nd installation files. Note This option is available only for Windows 7 an[...]

79 Appendix A Specifications Physical Specifications This section provides the dimensio n s and weight of the AT-2814FX ExpressCard. Dimensions: 13.7 cm x 3.4 cm (5.4 in. x 1.3 in.) Weight: 0.02 kg (0.05 lb) Environmental Specifications The following environm ental specifications apply to the AT-2814FX ExpressCard: Operating Temperature: 0°C to 45[...]

Appendix A: Specifica tions 80 Operating Specifications The following operating specifications apply to the AT-2814FX ExpressCard: Wavelength: 1310 nm Output Optical Power: 62.5/125 µm -19 (min) / -14 (max) 50/125 µm -22.5 (min) / -14 (max) Input Optical Power Minimum at Eye Center: -33.9 typical[...]

81 Appendix B Cleaning Fiber Optic Connectors This appendix explains how to clean fibe r optic connectors and includes the following topics:  “Overview” on page 82  “Cleaning Fiber Optic Connecto rs Using a Cartridge-T ype Cleaner” on page 83  “Cleaning Fiber Optic Connecto r Using a Swab” on pa ge 85[...]

Appendix A: Cleaning Fi ber Optic Connectors 82 Overview The fiber optic connector consists of a fiber optic plug and its adapter. The end of the fiber optic cable is held in the core of t he ferrule in the plug. Light signals are transmitted through the core of the fiber. Even minor smudges or dirt on the end face of the fiber, completely invisibl[...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 83 Cleaning Fiber Optic Connectors Using a Cartridge-Type Cleaner Fiber optic cartridge-type cleaners are availab le from many vendors and typically called “cartridge cleaners.” See Figure 4 3. Figure 43. Cartridge Cleaner Note Do not use compressed air or aerosol [...]

Appendix A: Cleaning Fi ber Optic Connectors 84 Note Rub the ferrule tip on the clea ning surface in one direction only. 3. When you reach the end of the cleaning surface, pick up the ferrule tip, rotate and place it at the top and ru b downwards at least 2 times. Caution Failing to pick up the ferrule tip when you reach the bottom of the cleaning [...]

AT-2814FX Fast Ethern et Fiber (SC) ExpressCard Install ation and User’s Guide 85 Cleaning Fiber Optic Connector Using a Swab Specially treated swabs (stick cleaner s) are available for clean ing inside connector adapters or hard-to-reach ferrule tips. These swabs, ofte n referred to as “lint free” or “alcohol fre e” swabs, are available [...]

Appendix A: Cleaning Fi ber Optic Connectors 86 3. If a fiber inspection scope is avail able, use the scope to inspect th e connector to make sure that it is clean and to check for scra tches, pits, or other problems that may affect performance. Note Always keep a dust cap on a fiber optic cable when it is not in use . Warning Do not stare into the[...]